<!DOCTYPE html>
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<html class="reftest-print">
  <style>
  summary::-moz-list-bullet {
    /* Hide the triangle for comparing with div in reftest. */
    list-style-type: none;
  }
  </style>
  <body>
    <details open>
      <summary>Summary<div style="page-break-before: always;"></div></summary>
      <p>This is the details.</p>
    </details>
  </body>
</html>
